"Matt Dillon, one of the FreeBSD kernel developers, decided that several of the approaches being used in the 5.x series were dead-ends, and in July 2003 forked the stable 4.x codebase to form DragonFly BSD. The 4.x FreeBSD Foundation meant that DragonFly has been a solid platform from the start. DragonFly, like the other BSDs, imports code from other members of the family when it makes sense, such as the malloc() security features from OpenBSD, parts of the WiFi subsystem from FreeBSD, and USB code from NetBSD. In spite of this, development has been pushed in some unique directions."